Where does bucket handle point to the Big Dipper in the four seasons?

Bucket handle in spring refers to the east, bucket handle in summer, bucket handle in autumn refers to the west, and bucket handle in winter refers to the north.

The Big Dipper refers to Shu Tian, Tian Xuan, Celestial Pole, Tianquan, Yuheng, Kaiyang and Yaoguang in the constellation Ursa Major. The ancients associated these seven stars together and imagined them as barrels of wine in ancient times, hence the name Beidou. The Big Dipper appears in different directions in the sky in different seasons and at different times at night.

In ancient times, Polaris was regarded as a symbol of God, and Beidou was the imperial chariot that God drove when he traveled around the world. The year began in spring, when Beidou was in the east, so God began to patrol from the east, so Yi Zhuan: "The Emperor was shocked" and divination was in the east. ?

Extended data

Find the North Star from the Big Dipper.

Graphically, the Big Dipper is located at the tail of the big bear. Six of these seven stars are secondary stars, and 1 is tertiary. Through the connection of the two stars in the mouth of the bucket, it extends about 5 times in the direction of the mouth of the bucket and finds the Polaris.

"Star Recognition Song" has: "Star recognition begins with Beidou, and then begins from north to west." Beginners can look for other constellations in turn from the Big Dipper. The seven stars of Ursa Major are arranged in the shape of a spoon.

Polaris is the brightest star in Ursa minor, also known as Alpha Star in Ursa minor. It is a yellow giant with a spectral type of F, about 434 light years away from the Earth, and its mass is about four times that of the sun. It is a bright star far away from the earth, at the tip of the bear's tail in the constellation diagram. Gou Chenyi is also a star of underworld nature.

Because the earth rotates around the earth axis, and Polaris is very close to the north extension line of the earth axis, Polaris is almost motionless in the sky at night, with its head tilted to the north, so it can indicate the north.

Although the tilt direction of the earth's axis will change because the earth revolves around the sun all year round, the distance between Polaris and the earth is much larger than the radius of the earth's revolution, so the change of the earth's axis caused by the earth's revolution can be ignored. So all the year round, we see that the position of Polaris in the sky seems to be motionless in the north. In fact, we just can't observe the subtle changes with the naked eye, and we feel that the earth axis always points to Polaris.

Baidu Encyclopedia-Big Dipper

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